Mold.



M. E. CHAMBERLAIN.

MOLD. APPLICATION FILED DEC-13.1917.

Patented June 4, 1918.

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MINOR E. CHAMBERLAIN, OF ST. LOUIS, MISSOURI.

MOLD.

Specification of Letters Patent.

Patented J one 4, 1918.

Application filed December 13, 1917. Serial No.206,877.

T 0 all whom it may concern.

Be it known that I, MINOR E. CHAMBER- LAIN, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a new and useful Mold, of which the following is a specification.

This invention relates to molds and has particular reference to molds for use in forming articles such as blocks, or bricks and other objects made by the hardening of plastic material.

A11 object of the invention is to produce a mold of novel, efficient and simple construction by which building blocks, etc., may be formed from plastic material. i

In the accompanying drawings in hich I have illustratedthe preferred embodiment of the invention,

Figure 1 is a mold.

Fig. 2 is a side elevation.

Fig. 3 is a sectional view on the line of Fig. 2. i i

Fig. 4 is a perspective view of one of the detachable end walls of the mold.

Fig. 5 is a perspective view of a presser plate interposed between the compression screw and the adjacent end wall of the mold.

Fig. 6 is a cross sectional view on the line 66 of Fig.1.

As illustrated the mold includes a base 1 which may be of wood or other light material and which is preferably of the width of the mold carried thereby. N ear. one end of the base an abutment 2 is secured, the same being strengthened by a brace 3 attached to the abutment and to the base 1.

The mold which is mounted on the base comprises a sheet metal receptacle including a bottom wall 4 arranged to rest upon the base, and upwardly extended side walls 5 which in the form shown are parallel with each other and are of equal-length, though it will be understood that variations may be made in this regard without departing from the invention. The upper edge of each of the side walls 5 is turned outwardly at approximately right angles relative to the side wall to provide a flange 6 on each side wall. Since the metallic mold chamber is composed of thin sheet metal the angular flanges 6 in connection with the side Walls efliciently brace and strengthen the side Walls to prevent them from bending or yielding under the pressure of the heavy plastic me:

plan view of my improved terial, such as cement, concrete or the like from which the molded objects are formed.

Each of the end walls of the mold comprises a strong Wall 7, one of which is arranged to bear against the abutment 2, as shown. Each of the walls 7 carries two spaced retainers 8 arranged to receive the side walls 5 between them and thereby prevent the side walls from spreading when subjected to the pressure of the plastic material. As shown in Fig. 1, the retaining blocks 8 extend under the flanges 6 and bear against the side walls 5 of the metal chamber throughout the width of said side walls, so that it is impossible for the side walls to bend outwardly.

At each end of the metallic receptacle a section 9 of fabricated material is placed between the end of the receptacle and the adjacent end wall 7 in order to form yielding abutments for the ends of the mold receptacle and to retain all of the material within the receptacle. The sections 9 of fabricated material are preferably separate and detached from the end walls and from the mold receptacle so that they may be readily removed and replaced.

The end of the base 1 opposite from the abutment 2 is. provided with a recess in which a plate 10 is secured. A bearing 11 is attached to the base above the plate 10 and is provided with a threaded hole in which a screw bolt 12 is operatively mounted. The outer end of the screw bolt 12.

may be provided with a manually engageable handle 13 by which the screw bolt may be turned in either direction. The base 1 below the plate 10 has two parallel grooves .14 and said plate has two parallel slots 15 above the grooves 14. A presser plate 16 rests edgewise upon the plate 10 and upon the base and has depending projections 17 extending through the slots 15. Each of the projections 17 has lateral extensions 18 on its lower end which are received within the grooves 14; under the plate 10 and thus prevent the plate 16 from rising when the screw bolt 12 presses the plate 16 against the end wall 7 of the mold. The plate 16 is detachable, the plate 10 being provided with openings 19 through which the extensions 18 may be inserted and withdrawn.

When the mold is to be used the sections 9 of fabricated material are placed between the blocks 8 and the ends of the mold receptacle engage against the fabricated mate. rial and hold the same from displacement. The screw bolt 12 is then operated to press against the plate 16 and presses the same against the end wall 7 and thus clamps all parts of the mold firmly in position so that when the plastic material is placed in the mold receptacle it will be formed into'a block or article of the desired shape andolf uniform density and porosity throughout.

My improved mold is readily detachable so that when any of the parts becomev injured or damaged such parts may be removed and replaced by other parts.

A mold of this construction is strong and eflicient; easily assembled and readily taken apart; the parts are easily replaceable and are not easily damaged or broken by use.

What I claim is 1. A mold, comprising a base, an abutment at one end of the base, an end wall for the mold removably supported against said abutment, two spaced retaining blocks rigidly secured to the end wall, a mold receptacle having side walls bearing against said retaining blocks, an end wall at the opposite end of the receptacle, two spaced retaining blocks on the second-named end wall bearing against the outer surfaces of the side walls of the receptacle, and a device carried by the base of the mold for pressing the second-named end wall against the mold receptacle and pressing the mold receptacle against the first-named end wall.

2. A mold, comprising a base, an abutment rigid at one end of the base, an end 'wall removably supported against said abutment, a mold receptacle bearing against said end wall and having side walls, two spaced retaining blocks secured to the end wall and bearing against the side walls of the receptacle, a second end-wall against the opposite end of the mold receptacle,

two spaced retaining blocks on' the second end wall bearing against the side walls'of the receptacle, a metallic plate bearing Copies of this patent may be obtained for against the outer surface of the second end wall, means in connection with the base for holding and guiding said plate, and a de' vice for pressing said-plate against the second end Wall to compress the mold receptacle between said end walls.

3. A mold, comprising a base, an abutment rigid near one end of the base, an end wall removably supported against the abutment, two spaced retaining block secured to the end wall, a section of fabricated material removably mounted between said blocks, a receptacle between said blocks bearing against the fabricated material, a second end wall near the, opposite end of the base, two spaced retaining blocks in connection with the second end wall bearing against the sidewalls of the receptacle, a section of fabricated material between said blocks forming therend wall of the receptacle, a plate slidably supported by the base, means in connection with the base for holding and guiding said plate, and a device for compressing the end walls and the receptacle together. Y

i 4.111 amold, a mold receptacle, a base for supporting the mold receptacle having grooves therein near one end of the recep: tacle, a plate rigidly secured to the base and having slots above the grooves of narrower width than the grooves in the base, an end wall forethe mold receptacle supported by the base, a movable plate arranged to. bear againstthe endwall, projections'on the movable plate extending through said slots in aid rigid plate and into the grooves in the base, lateral extensions on said pro jections within said grooves extending underthe rigid plate on opposite sides of said lots whereby said movable plate is held in-connection with the base, and a device for forcing said movable plate against said end wall and the latter against the end of the mold receptacle.

MINOR E. CHAMBERLAIN.

five cents each, by addressing t :2 Commissioner or Patents, Washington, D. G. 7 i 

